Supporting and reinforcing structure based on existing damaged retaining wall of fill slope
By using a support structure combining grouted micro piles and reinforced concrete masonry on the damaged retaining wall of the filling slope, the problems of complex construction and high cost in the existing technology are solved, and flexible and economical reinforcement effect is achieved , suitable for a variety of working conditions and environments.
Patent Information
- Application Number
- CN202420876297.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The prior art has problems such as complex construction, high equipment dependence, high cost and limited application scope in the reinforcement of damaged retaining walls under fill slopes, especially in the case of space and complex environment.
Using a support structure combining multi-row grouting micro piles and reinforced concrete masonry, the grouting micro piles are anchored into the deep strata and reinforced concrete masonry to provide anti-slip and anti-pollution force, and combined with PVC pipe drainage holes and anchors to form a flexible reinforcement design.
It achieves the reinforcement of damaged retaining walls of fill slopes that are simple and fast, low-cost, and suitable for various working conditions. It is especially suitable for occasions with space limitations and complex environments, reducing the impact on the surrounding environment.
Smart Images
Figure CN222140152U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of slope engineering reinforcement, in particular to a supporting reinforcement structure based on an existing damaged retaining wall of a fill slope. Background Art
[0002] In engineering construction, it is common to encounter existing fill slope retaining walls with damage and defects, such as bulges, water seepage, cracks, and outward inclination of the wall, which affect the bearing capacity of the retaining wall. In order to ensure the long-term stability of the wall, necessary reinforcement is required.
[0003] At present, the commonly used methods for strengthening damaged retaining walls mainly include: grouting reinforcement of the wall body or back of the wall, lattice anchor cable reinforcement of the wall surface, anti-sliding pile support reinforcement of the passive area in front of the wall, etc. However, these reinforcement measures all have certain disadvantages: for example, the grouting reinforcement scheme has the problem that the grouting volume and grouting pressure are difficult to control, and the pressure generated by the slurry during the construction process may aggravate the wall disease; or when there are existing buildings (structures) or pipelines on the top of the wall, the grouting construction is likely to have an adverse effect on its normal use. The reinforcement effect of the lattice anchor rod has high requirements on the bonding strength between the back of the wall soil and the anchor body. When the back of the wall is backfill soil, it cannot provide sufficient anchoring force for the anchor body, which can easily lead to the failure of the reinforcement project; at the same time, the setting of anchor rods in the wall body first requires the use of down-the-hole drilling. The external load generated during the drilling process can easily aggravate the damage of the retaining wall and even cause overall collapse. Although anti-slide piles have a large overall stiffness and can greatly improve the overall stability of the entire slope, they are expensive to build and cannot be constructed using large-scale machinery and equipment when the surrounding environment is complex or space is limited, which limits their scope of use. If bored piles are used, on the one hand, the construction speed is slow, and on the other hand, the construction safety risk is high. Therefore, they are not suitable for use under many working conditions. In addition, although anti-slide pile support can greatly improve the overall stability of the slope, its reinforcement effect on locally damaged walls is often limited.
[0004] Based on the above problems, there is an urgent need to develop a support and reinforcement structure based on the existing damaged retaining wall of the fill slope that is simple and fast to construct, has little impact on the surrounding environment, and can be applied to various working conditions. Utility Model Content
[0005] The utility model aims to solve the technical problems existing in the prior art. To this end, the utility model provides a support and reinforcement structure based on an existing damaged retaining wall on a fill slope, which is simple and fast to construct, has little impact on the surrounding environment, and can be applied to various working conditions.
[0006] The technical solution adopted by the utility model to solve its technical problems is:
[0007] Provided is a support and reinforcement structure based on an existing damaged retaining wall of a fill slope, comprising multiple rows of grouting micro-piles and reinforced concrete masonry bodies, wherein the grouting micro-piles are arranged at the outside of the foot of the damaged retaining wall along the direction of the retaining wall at a set interval and anchored into the deep stratum by drilling and grouting; the reinforced concrete masonry body is cast on the top of the grouting micro-piles; and the upper end of the grouting micro-piles is anchored into the reinforced concrete masonry body. This design utilizes the grouting micro-piles and the reinforced concrete masonry body to jointly provide anti-slip force and anti-overturning bending moment for the damaged retaining wall.
[0008] Preferably, a plurality of drainage holes formed by PVC pipes are arranged on the reinforced concrete masonry body at set intervals, preferably with a horizontal interval of 2.0 m. The PVC pipes extend into the backfill of the wall, and can timely drain the groundwater behind the wall to the outside of the slope.
[0009] Preferably, the grouting micro-piles are drilled using a small geological drilling rig, the spacing between piles is 3.0 to 5.0 times the diameter of the pile holes, and the row spacing is 1.0 to 2.0 m.
[0010] Preferably, the cross-section of the reinforcement in the grouting micro-pile is one of circular, U-shaped and I-shaped.
[0011] In a preferred embodiment, if the damaged position of the retaining wall is not higher than 1 / 3 of its height H above the ground, the reinforced concrete masonry body is cast in a multi-step shape, and the total height of the reinforced concrete masonry body exceeds the damaged position of the retaining wall, and the height of each step is H / 6.
[0012] Preferably, the grouting micro pile is anchored in each step.
[0013] In a preferred embodiment, if the damaged position of the retaining wall is higher than 1 / 3 of its height H above the ground, a reinforced concrete panel is cast on the side of the reinforced concrete masonry body close to the wall surface to reinforce the damaged position of the retaining wall.
[0014] Preferably, the reinforced concrete panel and the reinforced concrete masonry body are integrally reinforced and then cast into an integrated structure, and the thickness thereof is 300 to 400 mm.
[0015] Furthermore, a row of anchor rods is arranged on the reinforced concrete panel, and the anchor rods penetrate the retaining wall and are anchored into the deep stratum.
[0016] Compared with the prior art, the beneficial effects of the utility model are: the structure is cleverly designed, the form is flexible and changeable, the force is reasonable and clear, the construction is simple and fast, no large-scale mechanical equipment is required for construction, the cost is lower, the construction has low requirements for the width of the working surface, and the adaptability is strong. More importantly, the reinforcement construction has little disturbance to the existing damaged retaining wall, and can be well applied to various common retaining wall disease reinforcement projects, especially in the field of damaged fill slope retaining wall reinforcement projects under conditions of limited space, complex surrounding environment or emergency control. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0018] Figure 1 It is a cross-sectional view of the support and reinforcement structure of the existing damaged retaining wall based on the fill slope provided in the first embodiment;
[0019] Figure 2 It is a cross-sectional view of the support and reinforcement structure of the existing damaged retaining wall based on the fill slope provided in the second embodiment.
[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0021] 1—Grouting micro piles, 2—Reinforced concrete masonry body, 2.1—Reinforced concrete panel, 3—PVC pipes, 4—Anchor rods. DETAILED DESCRIPTION
[0022] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; the terms "install", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0026] Embodiment 1
[0027] As attached Figure 1 As shown, the damaged position of the retaining wall is no higher than 1 / 3 of its height H above the ground. This embodiment provides a support and reinforcement structure based on an existing damaged retaining wall on a fill slope, including multiple rows of grouting micro-piles 1 and reinforced concrete masonry bodies 2. The grouting micro-piles and reinforced concrete masonry bodies are used together to provide anti-slip force and anti-overturning bending moment for the damaged retaining wall.
[0028] Preferably, the grouting micro-piles 1 of this embodiment are provided in two rows, and the two rows of grouting micro-piles are arranged at the outside of the foot of the damaged retaining wall along the direction of the retaining wall with a row spacing of 1.0 to 2.0 m, and are anchored into the deep stratum by drilling and grouting.
[0029] In specific implementation, the grouting micro-pile is drilled with a small geological drill, and M30 cement mortar or fine-grained concrete is poured into the hole. The pouring method adopts the bottom grouting method. If the stratum is located in fill or other loose strata, a hole can be opened in the pile body, and secondary pressure grouting is used to improve the strength of the anchoring stratum. Generally, the borehole diameter is 150-200mm, the borehole depth is 6.0-15.0mm, and the depth of the hole is set according to the height of the slope. The higher the slope, the deeper the depth. The spacing between piles is 3.0-5.0 times the pile hole diameter. The cross-sectional form of the reinforcement in the grouting micro-pile can be flexible and varied according to actual conditions, such as: circular cross-section, U-section, "I" cross-section. The specific selection is determined by bending and shearing calculations. At the same time, the type of steel must be considered to ensure that the bending and shearing capacity requirements are met.
[0030] The reinforced concrete masonry body 2 is cast on the top of the grouting micro-pile, and is cast together with the grouting micro-pile in a cast-in-place manner to form a pile top beam. The cross-sectional width of the pile top beam can be comprehensively determined according to the height of the damaged retaining wall and the degree of damage. The upper end of the grouting micro-pile is anchored into the reinforced concrete masonry body to increase the bonding strength between the two.
[0031] Preferably, the reinforced concrete masonry body 2 is cast in a multi-step shape, and in this embodiment, it is preferably a two-step shape, and the total height of the reinforced concrete masonry body exceeds the damaged part of the retaining wall, and the height of each step is H / 6.
[0032] Preferably, the grouting micro pile 1 is anchored in each step.
[0033] Preferably, a plurality of drainage holes formed by PVC pipes 3 are arranged on the reinforced concrete masonry body 2 at set intervals. The PVC pipes extend into the backfill of the wall, and can timely drain the groundwater behind the wall to the outside of the slope.
[0034] Embodiment 2
[0035] When the damaged position of the retaining wall is higher than 1 / 3 of its height H above the ground, the difference between this embodiment and the first embodiment is only in the structure of the reinforced concrete masonry body. Figure 2 As shown, the reinforced concrete masonry body 2 of this embodiment is cast with a reinforced concrete panel 2.1 on the side close to the wall surface to cover the damaged position of the retaining wall. The reinforced concrete panel and the reinforced concrete masonry body are integrally reinforced and cast into an integrated structure, and its thickness is 300-400mm.
[0036] Preferably, a row of anchor rods 4 is provided on the reinforced concrete panel 2.1, and the anchor rods penetrate the retaining wall and are anchored into the deep stratum.
[0037] This embodiment adjusts the pile top beam to a whole panel on one side close to the damaged retaining wall to cover the entire damaged cracked area. It can be applied to working conditions when the damaged retaining wall surface bulges more severely, the crack position is higher or the range is larger.
[0038] The structural design of the above-mentioned embodiments is flexible and changeable, the force is reasonable and clear, the construction is simple and fast, no large-scale mechanical equipment is required for construction, the cost is lower, the construction has low requirements on the width of the working surface, and the adaptability is strong. More importantly, the reinforcement construction has little disturbance to the existing damaged retaining wall, and can be well applied to various common retaining wall disease reinforcement projects, especially in the field of damaged fill slope retaining wall reinforcement projects under conditions of limited space, complex surrounding environment or emergency control.
[0039] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A support and reinforcement structure based on an existing damaged retaining wall on a fill slope, characterized in that: It includes multiple rows of grouting micro piles and reinforced concrete masonry bodies. The grouting micro piles are arranged at the outside of the damaged retaining wall foot along the direction of the retaining wall according to the set spacing, and are anchored into the deep stratum by drilling grouting; the reinforced concrete masonry body is cast on the top of the grouting micro piles; and the upper end of the grouting micro pile is anchored in the reinforced concrete masonry body.
2. The support and reinforcement structure of the existing damaged retaining wall based on the fill slope according to claim 1 is characterized by: If the damaged position of the retaining wall is not higher than 1 / 3 of its height H above the ground, the reinforced concrete masonry body is cast in a multi-step shape, and the total height of the reinforced concrete masonry body exceeds the damaged position of the retaining wall, and the height of each step is H / 6.
3. The supporting and reinforcing structure of the existing damaged retaining wall based on the fill slope according to claim 2 is characterized by: The grouting micro pile is anchored in each step.
4. The support and reinforcement structure of an existing damaged retaining wall based on a fill slope according to claim 1 is characterized in that: If the damaged position of the retaining wall is higher than 1 / 3 of its height H above the ground, a reinforced concrete panel is cast on the side of the reinforced concrete masonry body close to the wall surface to reinforce the damaged position of the retaining wall.
5. The supporting and reinforcing structure of the existing damaged retaining wall based on the fill slope according to claim 4 is characterized in that: The reinforced concrete panel and the reinforced concrete masonry body are integrally reinforced and then cast into an integrated structure, and the thickness thereof is 300-400 mm.
6. The supporting and reinforcing structure of an existing damaged retaining wall based on a fill slope according to claim 4 is characterized in that: A row of anchor rods is arranged on the reinforced concrete panel, and the anchor rods penetrate the retaining wall and are anchored into the deep stratum.
7. The support and reinforcement structure for an existing damaged retaining wall based on a fill slope according to any one of claims 1 to 6, characterized in that: A plurality of drainage holes formed by PVC pipes are arranged on the reinforced concrete masonry body at set intervals, and the PVC pipes extend into the backfill body of the wall.
8. The supporting and reinforcing structure of an existing damaged retaining wall based on a fill slope according to claim 7 is characterized in that: The grouting micro piles are bored by a small geological drilling rig, the distance between piles is 3.0 to 5.0 times the diameter of the pile holes, and the row spacing is 1.0 to 2.0 m.
9. The supporting and reinforcing structure of an existing damaged retaining wall based on a fill slope according to claim 8 is characterized in that: The cross section of the reinforcement material in the grouting micro-pile is one of circular, U-shaped and "I"-shaped.